Bed-plate for rotary cloth-pressing machines.



No. 632,837. v Patnted Sept. I2, I899.

D. GESSNEB.

BED PLATE FOB RDTARY CLOTH PRESSING MACHINES.

(Application filed June 18, 1B97.|

(No Model.)

VNITED STATES PATENT ()FFICE.

DAVID GESSNER, OF IVORCESTER, MASSACHUSETTS.

BED-PLATE FOR ROTARY CLOTH-PRESSING MACHINES.

SPECIFICATION forming part of Letters Patent No. 632,837, dated September 12, 1899.

Serial No. 641,343. (No model.)

To all whmn it may concern:

Be it known that 1, DAVID GESSNER, a citizen of the United States, and a resident of \Vorcester, in the county of IVorcester and State of Massachusetts, have invented certain new and useful Improvements in Bed-Plates for Rotary Cloth-Pressin g Machines, of which the following-is a specification.

Heretofore in the use of such rotaryclothpressing machines as are shown in my Letters Patent numbered 387,290 and 576,666 it has been customary to prevent the backward springing of the bed-plate at the center either by the pressure of a third lever or by the pressure of an adjustable prop interposed between the back of the bed-plate and a trussrod. I have found that in exerting pressure by the above means for the purpose of preventing a backward spring of the bed-plate in pressing certain kinds of cloth the bedplate is sprung forward at the center, so as to take a permanent set with such forward spring at the center, and thus destroy its adaptability for pressing certain other kinds of cloth. Heretofore where such forward spring at the center has taken place the only known means of remedying the same has been to remove the bed-plates and replane them; but such means, besides being expensive and troublesome, has not prevented the same difficulty reoccurring as soon as the machine was called upon to change from one kind of cloth to another in pressing. I have discovered that by the simple means hereinafter described the ordinary operator of the machine can overcome the diiflculty without removing the bed-plate or altering its surface.

In the accompanying drawings, Figure 1 is an isometric view of a bed-plate to which my invention is applied. Figs. 2, 3, and 4 show difierent forms of truss-rods that may be employed. Fig. 5 is a detail of the lug on the back of the bed-plate.

11 is the bed-plate, having on its back at each end the parallel lugs 12 13 14 15. 8 is a truss-rod coupled at opposite ends to the said lugs by the coupling-pins 7 7. 4 is a lug secured to the back of the bed-plate at its cen ter, which lug is at right angles to the said end lugs.

1 is a shackle coupled to the lug 4 by the coupling-pin 5. v

2 is a shackle coupled to the middle of the truss-rod by the coupling-pinG.

3 is a right and left hand screw threaded at opposite ends into the shackles 1 and 2, respectively. IVhen, now, the tendency is to spring the middle of the bed-plate backward, the screw 3 is turned, so as to force it forward; but if the bed-plate comes to be sprung forward at the center the screw 3 is turned in the opposite direction, and I have found that by so doing the center of the bed-plate will be pulled backward toward the truss-rod, so as to remove the forward spring of the bedplate. In this way in consequence of the positive connection both for pushing and pulling between the screw 3 and the bed-plate and truss-rod, respectively, the operator may absolutely control the spring at the center of the bed-plate, so as to adapt the surface of the bed-plate for the pressing of Varied kinds of cloth.

In Fig. 1 the truss-rod is of the ordinary form, to the center of which the shackle 2 is coupled.

In Fig. 2 the truss-rod consists of two end parts 8 8 and an interposed part 9, coupled between the same by the coupling-pins 10 10. In this case the shackle 2 is coupled to a lug 16, fast on the part 9 and lying in a plane parallel with the lug 4. Therefore in this case the shackles 1 and 2 lie in the same plane, and by removing either the coupling-pin 5 or the coupling-pin 6 the shackles 1 and 2, with the connecting-screw 3, may be swung out-of position laterally.

In Fig. 3 the truss-rod, which is lettered 8, is made T form'in cross-section.

In Fig. 4 the truss-rod, which is lettered 8", is made U form in cross-section, with the shackle 2 secured between its two sides by the coupling-pin 6.

Truss-rods of the requisite stiffness to prevent buckling may be made from steel properly swaged for the purposes of this invention without unduly increasing their size.

I am aware that heretofore a bed-plate has been stayed from backward springing at the center by a truss-rod, with an adjustable prop interposed between the truss-rod and the bedplate, whereby the bed-plate could be sprung forward at the center; but I do not understand that said prop has ever heretofore had a positive engagement with the trussrod and bed-plate enabling it to spring the bed-plate backward at the center.

I have shown only one screw 3 engaging with the truss-rod and bed-plate, but do not limit myself to one, since more may be employed at difierent points along the truss-rod, if desired.

I have shown and described the invention as applied to a bed-plate having a truss-rod for securing pressure at the center; but in such a machine as that shown in my said patent No. 57 6,666 the function of the truss-rod is performed by the center lever. In applying my invention to such a machine the shackle 2will be coupled to the central lever instead of the truss-rod, and in the combination the lever is to be considered as the mechanical equivalent of the truss-rod.

' I claim In combination with a rotary cloth-pressingmachine bed-plate, a member located back of the same intermediate its ends and an adj ustable connection interposed between said member and the back of the bed-plate; said adjustable connection having a pulling and thrusting engagement both with the bedplate and with said member whereby the bedplate may be sprung either by a thrust forward or pull backward applied intermediate its ends, substantially as described.

DAVID GESSN ER.

Witnesses:

M. WILSON, CHAS. J. RATHJEN. 

